機器
PPE
3d
accessory
alarm
auditory
bicycle
businessman
care
clock
construction
cover
decibel
device
dream
ear
earplug
earplugs
engineer
equipment
factory
foam
hazard
hear
hearing
icon
isometric
level
loud
man
measurement
moon
neighbor
night
noise
noisy
office
pill
pillow
plug
protection
protector
resting
safety
sleep
sound
time
worker